using System;
using System.Collections.Generic;
using System.Data;
using ChaosBot.Database.Entity;
using Microsoft.Extensions.Configuration;
using NLog;

namespace ChaosBot.Database.Repository
{
    public static class ConfigurationRepository
    {
        public static IConfiguration AppSettingsHandler { get; set; }

        private static readonly string ServersTable = "ServerConfigurationFlags";

        /// <summary>
        /// Get global configuration option
        /// </summary>
        /// <param name="configurationFlag"></param>
        /// <typeparam name="T"></typeparam>
        /// <returns></returns>
        public static T GetValue<T>(string configurationFlag)
        {
            return AppSettingsHandler.GetValue<T>(configurationFlag);
        }

        /// <summary>
        /// Get guild specific configuration option
        /// </summary>
        /// <param name="configurationFlag"></param>
        /// <param name="guildId"></param>
        /// <typeparam name="T"></typeparam>
        /// <returns></returns>
        public static T GetValue<T>(string configurationFlag, ulong guildId)
        {
            if (Program._logger == null) return AppSettingsHandler.GetValue<T>($"Servers:{guildId}:{configurationFlag}");
            
            Program._logger.Info($"===> called for {configurationFlag} in {guildId}");
            Dictionary<string, object> filterColumns = new Dictionary<string, object>();
            filterColumns.Add("key", configurationFlag);
            filterColumns.Add("guildId", Convert.ToInt64(guildId));
            DataTable valueTable = Controller.SelectQuery(ServersTable, filterColumns: filterColumns);
            if (valueTable.Rows.Count == 1)
            {
                return ServerConfigurationFlag<T>.Deserialize(valueTable.Rows[0]["serializedValue"].ToString());
            }
            return AppSettingsHandler.GetValue<T>($"Servers:{guildId}:{configurationFlag}");
        }

        /// <summary>
        /// Grab configuration from appsettings.json, method does not look at the database
        /// </summary>
        /// <param name="configurationFlag"></param>
        /// <returns></returns>
        public static IConfigurationSection GetSection(string configurationFlag)
        {
            return AppSettingsHandler.GetSection(configurationFlag);
        }
    }
}